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K&N 33-2945 Air Filter

Replacement Filters > Replacement Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   5.0 out of 5 stars   34 Customer Reviews
  • Designed to boost horsepower and rate of acceleration
  • Can be cleaned and used again
  • High air flow with exceptional filtration
  • Lasts up to 50,000 miles before cleaning is required depending on driving conditions
  • Works with original equipment manufacturer vehicle electronics
  • Emissions legal in all 50 US states
  • Will NOT void vehicle warranty
  • Million Mile Limited Warranty®
The K&N 33-2945 Air Filter fits some Audi A4, Audi A4 allroad, Audi A4 Quattro, Audi A4 Quattro Cabriolet, Audi A5, Audi A5 Quattro, Audi allroad, and Audi Q5 models. See vehicle applications link for details.
K&N's replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. We make over 1,200 different replacement air filters for the majority of vehicles on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. See applicable instruction sheet for details. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty and will be the last air filter your vehicle will ever need.

[More Information on K&N Replacement Air Filters]

Product Specifications

Air Filter ShapePanel
Filter MaterialCotton Gauze
Height1.563 in (40 mm)
Outside Length12.625 in (321 mm)
Outside Width5 in (127 mm)
Package Contents1 Air Filter
Package Quantity1
Warranty1,000,000 Miles/10 Year
Product StylePanel Air Filter
Weight1.3 lb (0.6 kg)
Filter Re-Oiling Amount1.15 oz (34 ml)
Product Box Height1.75 in (44 mm)
Product Box Length13.56 in (345 mm)
Product Box Width7.72 in (196 mm)
WARNING: Cancer and reproductive

K&N 33-2945 Air Filter Product Reviews

Monday, September 10, 2018 - Part 33-2945
Easy to install and to replace the original air filter. Perfect fit. I think that the turbo engine is breathing better, responds better when needed.

Pio Valenzuela
Altoona, Wisconsin
Tuesday, August 7, 2018 - Part 33-2945
Always use K&N filters on my cars and my motorcycles. You can’t fault them.

Gavin Hardy
Blackburn, United Kingdom
Tuesday, July 17, 2018 - Part 33-2945
Very easy to follow instructions and install in the automobile. I noticed the previous filter had not been replaced by the dealer during regular scheduled service visits. I chose to opt for a 1million mile K&N option. I personally noticed 8-12 increase in gas mileage, and a clear throttle response on launch, as well as a noticeable throaty sound from the exhaust. That's my impression Several car enthusiast commented on the K&N sticker at a road rally.

Craig Carter
Silver Spring, Maryland